DE1066109B - Thermostatically actuated blooming device - Google Patents

Description

GERMAN PATENT OFFICE

KL.74d 8/04

INTERNAT. KL. GOSf

S 53542 VIIId / 74 ti

REGISTRATION DAY MAY 20, 1957

NOTICE
LOGIN
AND ISSUE OF THE
DISPLAY: SEPTEMBER 24, 1959

The invention is concerned with a new, compactly built and simple, thermostatically operated Flashing device of the relay type, which can be used particularly advantageously for signal systems in motor vehicles is.

Thermostatically operated switches are often used as .. »blinkers«, e.g. B. in signal lamp circuits for Motor vehicles. The actuating mechanism usually includes a thermally movable member such as e.g. B. a bimetallic strip or a high resistance stretching wire. The heat-movable limb causes the flashing contacts to close and open by alternating heating and cooling.

The heating of the thermally flexible member is effected electrically, for example by installing the member in the operating circuit of the turn signal. The "normally closed type" of the blinker is what is heat-movable Link in series with the main contacts of the indicator so that it is heated when the indicator contacts are closed. When the heat-moving member is warm enough to open the contacts has become, it interrupts its own heating circuit and then it cools down to close again of contacts.

The indicator is in the "normal open type"
Circle with high

Resistance heating

for

a that

heat-movable link shunted to the normally open indicator contacts. The short circuit in such a shunt circuit is insufficient to effect the load controlled by the blinker to reinforce; only when the heat-movable member is heated up to a predetermined value it closes the indicator contacts, shunting it with low resistance itself. The link then cools down until the indicator contacts reopen, and now repeats itself the cycle.

■ Signal systems for motor vehicles often also contain control or indicator lights that synchronize or light up alternately with the signal lamps. In general, the control or indicator lamp is through The armature of a relay is controlled with a working winding, the amplification of which is effected by the flasher will. Up to now, such combined flasher relay devices have been relatively unwieldy and complicated and expensive.

In recently issued U.S. Patents 2,706,227, 2,706,228, and 2,712,044 one is thermostatic actuated switching or flasher device shown and described, which has a novel snap plate made of electrically conductive material. This plate has an original bend provided after a straight line that goes across the plate, being divided into two or more Thermostatically operated flasher device

Applicant: ■ ·. ■

Signal-Stat Corporation, Brooklyn, N.Y. (V. St. A.)

Representative:

Dr. G. W. Lotterhos and Dr.-Ing. H. W. Lotterhos, Patent attorneys, Frankfurt / M., Lichtensteinstr. 3

Claimed priority: V. St. v. America June 6, 1955 '■

George Colombo, East Rockaway, N.Y.,

and Boris Orlov, Brooklyn, N. Y, (V. St. A.),

have been named as inventors

.2.

Sections of the line weakened or deformed the plate are provided. These sections are at a distance from the center of the plate at the inner end -and preferably also at the outer end of the plate edge. Shall such a plate in a snap switch are used, e.g. for flashing purposes, it is changed by a special force Curved line that is at an angle to the original bending line, with the force applied to the Attacks ends of the original bend. When this force subsides, the plate snaps again back to the original deformation; the process is strongly reminiscent of toggle lever action.

In such a deformed plate, elliptical lines of force and tension zones arise around the center the distance between the two parts of the original deformation line as the central point are oriented. When the plate is held or fastened at one point of these lines of force (as a mounting point) the plate swings around this assembly point. It will be the greatest possible force in the Zi'titral point exercised, but considerable forces are applied also exercised in the parts of the plate that lie opposite the assembly point on the lines of force.

Such a plate can be effectively used in a snap switch when the plate is fastened a high resistance wire or strip at the ends of the original bending line in the power-operated position is held back. This high resistance wire or strip holds the Plate bent back by force in the distorted (anomalous) position about a line that coincides with the original bending line forms an angle. if

009 629/95

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Electric current flows through the high resistance wire, it heats up and expands. At this Expansion of the wire is reached a level at which the wire tension depends on the kinetic energy is overcome, which is stored in the plate by bending it from its original bent position has been. At this moment the plate snaps back into its original bent position return.

Such a plate can be effectively used as a switch by making a contact on it a point that lies beyond the deformation line from the attached mounting point. if the plate snaps back (etc.) the contact point comes into and out of contact with a contact, which is clear to the assembly purict.

The already mentioned US Pat. No. 2,706,228 deals in particular with one of these Snap switch or flasher type in which the need for a ballast resistor in the flasher circuit is turned off by attaching a special, heat stretching cord and acting on the plate Wire at each end of the plate, and by wrapping an electrically insulated high resistance member around it around the said plate deformer, in order to heat the latter when the blinker is excited.

The present invention uses such a known snap plate to create a new, relay-like, thermostatically working blinker.

The new thermostatically operated flasher device, especially for signal systems in motor vehicles, the one relay core made of electrically conductive; paramagnetic material, its winding in the Flashing breaks are not traversed by the battery current and with a thermostatically operated switch. member cooperates, is therefore characterized according to the invention in that as thermostatic actuated switching element a known -electric heat switch is used, which consists of a snapping, resilient plate made uneven by pre-deformation, which by tightening a temperature-dependent Spannglicdes snapped into a spatial shape of other unevenness and when it slackens this suit snaps back to the original rub.

A flasher device has already become known that has an electromagnetic interrupter is working; In this known device, a hot-wire-controlled switch armature serves as an interrupter. This known approach to the problem on which the invention is based does not reveal the essential ones Advances made when using a snap plate. These lie in the fact that without Another great snap and also quite a significant speed of transition Snap plate from one position to the other results. This also results in an increase in Flashing frequency, i.e. more noticeable flashing signals.

Further details of the invention can be found in the explanation of the examples shown in the drawings emerged.

■. In Figs. 1 to 6, an embodiment is the Invention shown. Show it

Fig. 1 and 2 opposite sides of a flasher device according to the invention in view, the housing on average,

3 and 4. the other two side views of the same device in the same representation.

5 shows a plan view of the flasher device with the housing removed,

6 shows a circuit diagram of the flasher device for a signaling system on motor vehicles.

The snap plate 10 located in the flasher device and its heat-movable actuating means are essentially to the corresponding members in U.S. Patent 2,712,044 similar. The plate is preferably made of electrically conductive spring metal, the The suspension factor, the stiffness, the temperature coefficient and the like is to be selected according to the desired snap conditions.

To the plate 10 an initial shape and the necessary depth to function as a kind of beam to give, the plate, shown essentially as a rectangle, along one of the corners 11 and 12 connecting diagonal deformed or weakened. This deformation is preferably done by rectilinear Pressing out a hump along the line 11, 12 in two separate parts 15 causes.

Corresponding to the bosses 15, 15 are the sections 13 and 14 of the plate on either side of the line 11, 12 bent outwards so that the plate assumes the shape of a shallow V with the apex line 11, 12. When plate-bending forces become effective at the ends of this line and the size of these forces is equal to the effort of this plate to remain or to remain in its current state. overcomes this tendency, the plate snaps into a new bending or deformation position, which is a other shallow V with Schcitcllinic after the other Diagonal 16, 17 forms. If the forces at points 11 and 12 decrease so far that they of the energy stored in the plate 10 due to the previous rotation is overcome, the plate snaps back into a bending position along the line 11, 12.

Photographic made with polarized light !! a translucent plate of this type show im unchanged central area of the plate lines of force of elliptical band shape with after the Plate center-directed radii, 'when the plate is on one of these elliptical lines of force held or

. is supported, with the force application points for the bending forces on the corner part. 12 of the plate in the The longitudinal direction of the boss 15 lie. In this way the forces are kept away from the central area of the plate and distributed between two points that are both spaced from the center of the plate. This lengthens strongly the use time of the plate until signs of fatigue appear in the force-loaded Section of the plate.

V. of the phenomena described above is used in the electrical and mechanical support of the Plate 10 on such an elliptical line of force made use of the electrically conductive metal core 20 of the flasher relay and by the 'electrical and mechanical attachment of a Contact 18 on the plate 10, namely on the part of the plate mounting surface which is defined by the line 11, 12 is separated from the plate mounting point.

It is now an indirectly heated, heat-expanding member 40 made of conductive metal on the bent corners 11, 12 of the plate. 10, drawing them together by soldering or spot welding the Ends of the member 40 attached to the plate 10, which attachment then takes place on the plate when this is deformed by force about the diagonal 16, 17. This when the member 40 is heated and has expanded by a certain amount, the

Claims (7)

■ kiaiiiii, kinetic energy in the plate 10 gain the upper hand over the tension of the link 40 and let the plate snap into its previous position bent around the diagonal 11, 12. The member 40 is heated by an insulated high resistance wire 45 which is wrapped around the member and electrically connected to it at one end. The relay core or frame 20 is generally flat and relatively thin, but rigid, and is attached to the dielectric base plate 30 of the flasher. Three contact pieces or terminals 31, 32, 33 are attached to the lower surface of the base plate 30, for example by rivets 31 ', 32', 33 'which pass through the base plate and connect the bent inner ends of the contact pieces to the base plate. The core 20 has a bent arm 21 which is soldered or welded to the rivet 32 'and thus establishes the electrical connection to the terminal 32. An arm 22 bent outwardly and then upwardly from the upper end of the core 20 is in electrical and mechanical communication with the plate 10. Another arm 23 extending outwardly and then upwardly from the lower edge of the core 20 carries an insulated sleeve 24 , around which a flat conductor 26 is wound which carries a contact 27 which can come into contact with the plate contact 18. The central part, that is the body 28, of the core 20 carries the relay winding 25 consisting of relatively strong, insulated wire. One end of this winding is connected to the rivet 31 ', and its other end is connected to the contact 27. With the Rivet 31 'is also connected to one end of high resistance winding 45. Arms 34,36, which protrude laterally from the fuselage, create an air slot in the magnetic circuit of the core 20. The upper arm 34 has a slightly curved vertical projection to which a thin leaf spring 3? "Of conductive metal is mechanically and electrically connected Spring 37 carries a conductive paramagnetic armature 35 which is transverse to the air gap and overlaps the core lower arm 36. The bending of the projection of arm 34 causes the free end of armature 35 to protrude obliquely from arm 36. The free end of armature 35 is formed into a contact 38 which can come into contact with the rivet 33 'of the terminal 33. A stop 39 limits the outward movement of the armature 35. The operation of the device can be seen from FIG The unit is installed in a suitable container so that the terminal 31 is connected to one side of a grounded battery or other source of electrical energy 55 during the terminal 32 is connected to the armature 51 of the selector switch 50 and the terminal 33 is connected to the grounded control or signal lamp PL. The contact 52 of the switch 50 is connected to the parallel grounded signal lamps SL, and the contact 53 of the switch 50 is connected to the parallel grounded signal lamps SL '. When the switch 51 is applied to one of the contacts 52 or 53, a first series circuit is closed as follows (provided that the relevant signal lamps are illuminated): earth, battery 55, terminal 31, rivet 31 ', high-resistance wire 45, element 40, Plate 10, arm 22, core 20, arm 21, rivet 32 ', terminal 32, switch arm 51, contact 52, lamps SL or SL'. Due to the resistance of the wire 45, the current flowing through it is not sufficient to light the lamps. The wire 45 heats the heating element 40. The latter expands and the plate 10 snaps over, as a result of which its contact 18 comes into contact with the relay armature contact 27. The contact of contacts 18 and 27 completes a second series circle (shunt wire 45) as follows (from rivet 31 '): relay winding 25, contacts 27, 18, plate 10, core arm 22 and now as previously described in the first series circle. The current flowing through is now sufficient to light up the lamps and activate the relay. The armature 35 is drawn towards the arm 36 and causes the contact 38 to meet the rivet 33 ', whereby the circuit is closed for the control lamp PL, which now lights up in synchronism with the signal lamps SL. The limb 40 is now cooling and contracting; the plate 10 snaps back into the force-deformed position and the contacts 18, 27 diverge, as a result of which the signal lamps SL go out and the relay also interrupts the circuit of the control lamp PL. And now the game repeats itself. When the relay is operating, a magnetic attraction is exerted on the plate 10 by the core 20 which is reluctant to separate the contacts 18,27. Finally, when the force of member 40 has increased so that it gains the upper hand over this magnetic attraction, there will be a very pronounced (i.e., sudden) snapping apart of said contacts which will minimize the effects of the arcing at these contacts limited. Should one of the lamps lying in parallel be defective, the current flowing in the winding 25 remains insufficient to operate the relay; the control lamp 50 will not light up when the switch 50 is closed. This gives the observer a sign that the signal lamps need to be checked. The embodiment shown is only to be regarded as an example. The scope of the invention also includes other embodiments insofar as these have the features of the essence of the invention. Independent protection is not claimed for the subclaims. P.v τ ε ν τ λ χ s ρ η Π c π E: 1. Thermostatically operated flashing device, especially for signal systems in motor vehicles, with a relay core made of electrically conductive, paramagnetic material, its winding Battery current does not flow through during the blinking breaks is and cooperates with a thermostatically operated switching element, characterized in that, that as a thermostatically operated switching element (10) a known electrical Thermal switch is used, which consists of a snapping, pre-deformed, uneven, resilient plate is made, which by tightening a temperature-dependent tendon in a Spatial shape of other unevenness snapped and when this suit slackened to the original Snaps back bumps. 2. Flashing device according to claim 1, characterized in that the with the thermostatic actuated switching element (10) cooperating relay core (20) has an air gap at which, electrically connected to it, an armature (35) is movably mounted, which extends across the air gap and closes it when the through the relay winding (25) flowing current reaches a specified level. 3. Flashing device according to claim 2, characterized in that the relay core (20) on one dielectric base plate (30) is attached. 4. Flashing device according to Claim 1 and 2, characterized in that the relay core (20) a body on which the winding (25) lies, and a pair of arms (34, 36) extending from it which limit the air gap, and that the armature (35) is mounted on one (34) of these arms is such that it is normally spaced from the other arm (36). 5. Flashing device according to claim 4, characterized in that the armature (35) is made electrically conductive, paramagnetic material and by means of a leaf spring (37) on one arm (34) is attached. 6. Flashing device according to claim 1 and 2, characterized in that the thermostatic Means for actuating the switching element (10) an electrically conductive one which expands in the heat Contain metal strip (40) attached at each end to the switching link (10), normal holds this in the deformed position and heated by a high resistance conductor (45) will. 7. Flashing device according to Claim 1 and 2, characterized in that the switching element (10) is attached to a fixed point of the relay core (20) and a contact means on its free part (18) which can come into contact with a core contact (27). Considered publications:
German utility model No. 1 721 623;
U.S. Patent Nos. 2,706,227, 2,706,228, 712,044. 1 sheet of drawings © 909 629/95 9.